Improvement in photographic-printing frames



2Sheejs--SheetL I. M. VAN WAGNER S. E. P. GRISWLD.

Photographic Printing-Frames.

N0 50 497 Patented Maj/5,1874.

iff @72g ATTURN S. J

, Q Sheets--Sheetl. M. VAN WAGNER & E. P. GRISWDLD.

Photographic Printing-Frames. N0,.50,497. Patenredrvlay 5,1874.

Ulvrrrm iSTATES PATENT @Errea isAAo M. vAN wAeNnn, or NvAcK, AND EZnA r.emswoLD, or New voi-nr, N. Y.

IMPROVEMENT IN PHOTOGRAPHIC-PRlNTING FRAMES.

Specification forming part of Letters Patent No. 150,497, dated May 5,i874; application filed January 3l, 1874.

To all whom tt may concern:

Be it known that we, IsAAC M. VAN WAG- NER, of Nyack, in the county ofRockland and State of New York, and EZRA I. GRiswoLD, ot' the city,county, and State of New York, have invented a new and usefulImprovement in Photograph-Printing Apparatus, oi' which the following isa specification:

This invention relates to new and important improvements in apparatusfor printing photographie pictures; and consists in an adjustablevignetting attachment to the ordinary printing-frame now in use, bymeans of which the light-opening, by means of longitudinal andtransverse or other movable slides, is adj usted to the picture on thenegative. It also consists in a device for varying the distance andposition of the light-opening from the negative. It also consists in acontractin g and expanding diaphragm, for varying the form and size ofthe light-opening, all as hereinaiter set forth and described.

In the accompanying drawing, Fi gure l represents a top view, showingthe light-opening and the movable slides. Fig. 2 is a view ot' thereverse side ofthe common printing-frame, showing, also, the edge of ourattachment or adjusting-frame. Fig. 3 is a cross-section of Fig. 2,taken on the line -zv Fig. 4. is a longitudinal section taken on theline y y ot' Fig. 2. Fig. 5 is a side view of the ordinary plate,through which the light-opening is made, as at present used. Fig. 6 is aview of the expansible and contracting diaphragm, the construction beingrepresented in dotted lines. Fig. 7 is a cross-section of Fig. 6 on theline z z.

Similar letters oi' reference indicate corresponding parts.

A represents the old or common printingframe. B is a frame whichsurrounds A, which is provided with springs C, or with any other device,as bellows, straps, Src., by means of which this frame B may be raisedand lowered, and fastened in any desired position, either level orparallel with the frame A, or inclined in either direction, as may bedesired.

D D are grooved cleats on the upper side ot' the frame I3. E is a slideconfined in the grooves ofthe cleats I) D, so that it is readily movedback and forth on a line parallel with the cleats. F F are groovedcleats on the slide E. These cleats are placed at right angles with thecleats D D. G isa slide, which is readily moved back and forth on a lineparallel with the cleats F F. rEhe slide E has a large opening in itscenter. The smaller slide Gr has an opening, over which the plate whichcontains the light-opening is placed, and which is adjusted, by means otthe movements before described, to the picture on the negative.

Instead of this slide G, a slide or diaphragm having an opening whichmay be expanded or contracted, by means of adjustable plates orotherwise, maybe employed. H represents such a slide, (see Fig. 6,) onwhich is fastened a plate, I, which has slots, J, in it. K are slidingplates between the slide H and the plate I, which are guided by means ofa pin, I', in each plate, which work in the slots J. These slidingplates K are arranged so as to allow their edges to lap over each other,as seen in the drawing.

By means of a diaphragm of this description, having a light-apertureadjustable as to form and size, the delay and expense of eutting a platefor the light-opening from metal, pasteboard, or other material areavoided.

XVe do not confine ourselves to any particular kind or style ofdiaphragm. It may be made in any manner, and of any number ot pieces. nA

The device for varying the distance of the light-opening from thenegative and fastening it either parallel with the negative or in aninclined position thereto may be made in any manner, and set-screws L L,or other means, may be employed for fastening it in the desiredposition.

By means ot' this adjustment the proper exy pression and blending ofshades are given the picture and the vignette.

M are springs for fastening the light-open- 4. The adjustable slide Gand cleats F F,in combination with the slide E, for the purposesdescribed.

5. The slide or diaphragm H, or equivalent expanding and contracting`device, by means of which the light-aperture is Varied at will in sizeand form, substantially as described.

ISAAC M. VAN WAGNER. EZRA I. GRISWOLD.

Witnesses:

T. B. Mosman, ALEX F. ROBERTS.

